package com.bigevent.controller;

import com.bigevent.pojo.Result;
import com.bigevent.pojo.User;
import com.bigevent.service.inter.UserService;
import com.bigevent.utils.JwtUtil;
import com.bigevent.utils.Md5Util;
import com.bigevent.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RestController
@RequestMapping("/user")
@Validated
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password) {


        //查询用户
        User u = userService.findByUserName(username);
        if (u == null) {
            //用户名没有重复,进行注册
            userService.register(username, password);
            return Result.success();
        } else {
            //用户名重复
            return Result.error("用户名被占用");
        }

    }

    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password){
        User loginUser = userService.findByUserName(username);

        //判断查找的用户是否存在
        if(loginUser == null){
            return Result.error("用户不存在");
        }

        //判断密码是否正确，注意密码是加密过的
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token = JwtUtil.genToken(claims);
            //将token存储到redis中
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set(loginUser.getUsername()+":"+loginUser.getId(),token,1, TimeUnit.HOURS);
            return Result.success(token);
        }

        return Result.error("密码错误");
    }

    @GetMapping("/userInfo")
    public Result<User> userInfo(){
        //从全局维护的ThreadLocal（在ThreadLocalUtil工具类中）对象中拿取数据
        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUserName(username);
        return Result.success(user);
    }

    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){//@Validated使得validation生效
        userService.update(user);
        return Result.success();
    }

    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl){//validation使用@URL注解保证传来的参数是一个合法的url地址
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String ,String> params,@RequestHeader("Authorization") String token){
        //校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");

        if(!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要的参数");
        }

        //校验原密码是否正确
        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUserName(username);
        if(!user.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码填写错误");
        }

        //校验newPwd与rePwd是否相同
        if(!newPwd.equals(rePwd)){
            return Result.error("两次填写的密码不一样");
        }

        //校验全部通过，开始更新
        userService.updatePwd(newPwd);
        //删除redis中对应的token
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        Map<String, Object> stringObjectMap = JwtUtil.parseToken(token);
        operations.getOperations().delete(stringObjectMap.get("username")+":"+stringObjectMap.get("id"));
        return Result.success();
    }

}
